Valveless pump.



A. INOKUTY.

VALVELESS PUMP.

APPLICATION FILED rm. 2a, 1910.

973,353. Patented 0318,1910.

QM m

ARIYA INOKUTY, OF TOKYO, JAPAN.

VALVELESS PUMP.

Specification of Letters Patent.

Application filed February 26, 1910.

Patented Oct. 18, 1910.

Serial No. 546,153.

To all whom it may concern:

Be it known that I, ARIYA INOKUTY, a

subject of the Emperor of Japan, residing in the Province of Tokyo,Japan, have invented a certain new and useful Improvement in ValvelessPumps, of which the following is a specification.

This invention relates to improvements in valveless pumps of that classincluding a casing providing a cylinder, and a plungerpiston operatingin said cylinder, the cylinder and plunger-piston having inlet anddischarge ports adapted to be brought into and out of registry.

One of the principal objects of the invention is to provide means foroscillating the plunger-piston during its reciprocating movement tobring its ports into and out of registry with the cylinder ports therebywholly avoiding the use of valves.

In one embodiment of the invention where the plunger-piston isreciprocated by a crank, in which case the speed of reciprocation of thepiston from one limit of its movement to the other will vary, theinvention provides for a full open registry of the ports at the maximumspeed of the piston with a gradual closing movement during the decreasedspeed whereby undue frictional resistance of the passing liquid issubstantially wholly avoided. I

The invention has other objects and novel features which will be morefully described in connection with the accompanying drawing and will bemore particularly pointed out and ascertained in and by the appendedclaims:

In the drawing :Figure 1 is a longitudinal vertical sectional view of avalveless pump embodying the main features of my invention. Fig. 2 is asectional view on line 2-2 of Fig. 1. Fig. 3 is a horizontal section online 3--3 of Fig. 1. Fig. 4 is a sectional view on line 44 of Fig. 1.

Like numerals of reference designate similar parts throughout thedifferent figures of the drawing.

As illustrated, the pump comprises a casing 1 providing a cylinder 2,having an inlet port 3, and a discharge port 4. The lower end of thecylinder is closed by a plug 5 and the upper end is provided with asuitable stufiing box or packing gland 6. It will be understood howeverthat the invention is not limited to this specific form of pump. Aplunger-piston 7 is disposed in said cylinder and is preferably hollowat its lower end, as indicated at 8. The piston 7 is provided with aninlet port 9, adapted to register with port 3, and also a discharge port10, adapted to register with port 4. The upper end 11 of theplunger-piston projects through the gland 6 and is provided with a rod12 which projects through a suitable bearing 13.

An arcuate member is connected with the plunger-piston, and as shown,said member comprises segmental elements 14 and 15, be tween which isslidably mounted a cross head 16. Conveniently the rod 12 is dividedinto sections 17 and 18 and the segmental element 15 is formed integralwith the section 18 while the element 14 is formed integral with thesection 17. The segmental elements 14 and 15, are conveniently connectedby bolts 19 and 20 and are held in proper spaced relation by spacingblocks 21 and 22.

It will be seen from the foregoing that the arcuate member is connectedwith the piston in such a manner that the longitudi nal center orneutral points of the arcuate member coincides with the longitudinalaxis of the plunger piston and that the arcuate member is disposed in aplane at right angle to the longitudinal axis of the piston.

In the constructionshown, the means for reciprocating the piston is inthe form of a crank shaft 24, mounted in'suitable bearings 25, andprovided with a crank 26. The crank 26 is disposed 'in a plane at rightangles to the longitudinal axis of the plunger piston and projectsthrough and between the elements 14 and 15 of the arcuate members, withthe longitudinal axis of the shaft portion intersecting the axis of theplungerpiston. The cross head 16 is bored to receive the crank 26 and isprovided with flanges 27 to allow for the requisite amount ofslidingmovement of the cross head 16 with respect to the crank 26 if such movement is necessary.

hen the crank 26 is in the position shown in Fig. 1, with the cross head16 in a neutral position with respect to the arcuate member, downwardmovement of the crank 26 in a clockwise direction will impart simi larmovement to the plunger-piston and will advance the cross head in thedirection of the arrow at (Fig. 4.) thereby shifting the plunger pistonso as to gradually bring the port 9 into register with the ports 3. It

will be understood however that when the plunger piston is in theuppermost or lowermost position neither ports 9 nor 10 will be inregistry with corresponding cylinder ports. Upon beginning of downwardmovement of the crank, the port 9 will be gradually shifted into aregistering position with the port 3, and when the plunger piston is inan intermediate position the port 9 will be in full registry with theport 3, and the cross head 16 will be at the limit of its movement inthe reverse direction to that shown in Fig. 4. The remaining travel ofthe plunger-piston downwardly will be accompanied by the rearwardmovement of the cross heads 16 in the direction of arrow Z) graduallyputting port 9 out of registry with port 3. The downward movement of theplungerpiston will force the liquid out through port- 9 and port 3,owing to the fact that port 10 is out of register with port 4:. It willbe noted that the ports 9 and 10 are elongated so as to maintain aregistered relation with their corresponding ports when theplunger-piston is reciprocated.

lVith the plunger piston in its lowermost position, and the crank in asimilar position, the cross head will occupy a neutral position in thearcuate member and upward move ment of the crank will cause the crosshead to travel in the direction of the arrow 6 to the extreme positionshown in Fig. 4. Upon upward movement of the crank 26 the port 9 will beshifted farther out of registry with the port 3 and the port 10 will begradually shifted into registry with the port at and such upwardmovement of the plunger-piston will draw the liquid into port a and intothe cylinder 2. Full registry of the port 10 with the port at will beeffected when the plunger-piston has reached its intermediate positionand when the plunger has reached the position shown in Fig. 1

the port 10 will be shifted out of registry with the port 4.

1. In a valveless pump, the combination with a cylinder and aplunger-piston, said cylinder and piston being provided with inletdischarge ports, an arcuate member connected with said plunger-piston, acrank for operating said plunger-piston, and means slidably connectingsaid crank with said arcuate member.

In a valveless pump, the combination with a cylinder and plunger-pistonprovided with inlet and discharge ports, of an arcuate member connectedwith said plunger-piston and disposed at right angles with respect tothe longitudinal axis thereof, and a crank for reciprocating saidplunger-piston and connected with said arcuate member to oscillate saidplunger-piston.

3. In a valveless pump, the combination with a cylinder and a pistonprovided with inlet and discharge ports, an arcuate member connectedwith said piston and disposed at right angles with respect to thelongitudinal axis thereof, a crank disposed at right angles to thelongitudinal axis of said piston, and means operatively connecting saidarcuate member with said crank for reciprocating and oscillating saidpiston.

4. In a valveless pump, the combination with a cylinder and aplunger-piston each provided with inlet and discharge ports, of anarcuate member rigidly connected with said piston, a cross head slidablysupported on said arcuate member, and a crank connected with said crosshead.

In testimony whereof I afi'ix my signature in presence of two witnesses.

ARIYA INOKUTY.

\Vitnesses Smcnn Mom, Y ASUNOSUKE F UKUKITA.

